Anthropic’s Claude Opus 4.5 and OpenAI’s GPT-5.3-Codex: Pioneering the Future of Software Engineering
Analysis 2026-05-12 © Gate of AI Anthropic and OpenAI are redefining software engineering with their latest large language models, setting new benchmarks in real-world application and performance. Gate of AI Editorial Team · 2026-05-12 · 10 min read Key Takeaways GPT-5.3-Codex achieved state-of-the-art results on SWE-Bench Pro. Anthropic’s Claude Opus 4.5 excels in complex software
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